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J Neurol Surg B Skull Base 2024; 85(01): 095-105
DOI: 10.1055/s-0042-1759873
Original Article

Mandibular Fossa Approach to Petroclival and Anterior Pontine Lesions

Redi Rahmani
1   The Loyal and Edith Davis Neurosurgical Research Laboratory, Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, United States
,
Irakliy Abramov
1   The Loyal and Edith Davis Neurosurgical Research Laboratory, Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, United States
,
Visish M. Srinivasan
1   The Loyal and Edith Davis Neurosurgical Research Laboratory, Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, United States
,
Mohamed A. Labib
1   The Loyal and Edith Davis Neurosurgical Research Laboratory, Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, United States
,
Lena Mary Houlihan
1   The Loyal and Edith Davis Neurosurgical Research Laboratory, Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, United States
,
Joshua S. Catapano
1   The Loyal and Edith Davis Neurosurgical Research Laboratory, Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, United States
,
Peter Q. Quinn
2   Department of Oral and Maxillofacial Surgery, University of Pennsylvania School of Dental Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, United States
,
Michael T. Lawton
1   The Loyal and Edith Davis Neurosurgical Research Laboratory, Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, United States
,
Mark C. Preul
1   The Loyal and Edith Davis Neurosurgical Research Laboratory, Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, United States
› Author Affiliations Funding This study was supported by funds from the Newsome Chair in Neurosurgery Research held by Dr. Preul and by funds from the Barrow Neurological Foundation.
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Abstract

Objective To describe the anatomy related to a novel approach to the petroclival region through the mandibular fossa for the treatment of petroclival and anterior pontine lesions.

Design Five dry skulls were examined for surgical approach. Three adult cadaveric heads underwent bilateral dissection. One cadaveric head was evaluated with computed tomography after dissection.

Setting This study was performed in an academic medical center.

Participants Neurosurgical anatomy researchers performed this study using dry skulls and cadaveric heads.

Main Outcome Measurements This was a proof-of-concept anatomical study.

Results The mandibular fossa approach uses a vertical preauricular incision above the facial nerve branches. Removal of the temporomandibular joint exposes the mandibular fossa. The anterior boundary is the mandibular nerve at the foramen ovale, and the posterior boundary is the jugular foramen. The chorda tympani, eustachian tube, and tensor tympani muscle are sectioned. The carotid artery is transposed out of the petrous canal, and a petrosectomy is performed from Meckel's cave to the foramen magnum and anterior occipital condyle. Dural opening exposes the anterior pons, vertebrobasilar junction, bilateral vertebral arteries, and the ipsilateral anterior and posterior inferior cerebellar arteries. At completion, the temporomandibular joint is reconstructed with a prosthetic joint utilizing a second incision along the mandible.

Conclusions The mandibular fossa approach is a new trajectory to the petroclival region and the anterior pons. It combines the more anterior angle of endoscopic approaches along with the enhanced control of open approaches. Further study is necessary before this approach is used clinically.

Keywords

glenoid fossa - mandibular fossa - petrosectomy - petrous carotid - superficial temporal artery - temporomandibular joint

Note

The abstract was presented at the North American Skull Base Meeting; Phoenix, AZ; February 18–20, 2022 (abstract A113).




Publication History

Received: 26 August 2022

Accepted: 12 November 2022

Article published online:
03 January 2023

© 2023. Thieme. All rights reserved.

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany

 

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